一项最新的研究结果显示,一些树木在高浓度二氧化碳的环境中提前繁殖并产生出更多种子。这项研究表明,二氧化碳的增加能使部分植物从中受益,如生长加快等,但这些变化另一方面则可能会减少森林生物种类的多样性。在过去一百年间,大气中二氧化碳的含量增加了近40%,而且几乎可以肯定这个比例还将继续增加。二十多年来,科学家们一直想弄清楚植物对这一变化是如何反应的。美国杜克 A recent study shows that some trees prematurely breed and produce more seeds in a high-CO2 environment. This study shows that the increase of carbon dioxide can benefit some plants, such as growing faster, but these changes, on the other hand, may reduce the diversity of forest biological species. Over the past 100 years, the atmospheric carbon dioxide levels have increased by nearly 40%, and almost certainly this proportion will continue to increase. For more than two decades, scientists have been trying to figure out how plants react to this change. American Duke